Tooth construction for digging-buckets



APPLICATION FILED MAR. 30. I9I5.

Patented Mar. 16, 1920.

LV/TNESSES JOHN W. KITTREDGE, OF AKRON, OHIO.

TOOTH CONSTRUCTION FOR DIGGING-BUCKETS.

Application filed March 30, 1915.

To all whom. it may concern.

Be it known that 1, JOHN Krrrmanor, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a new and useful Tooth Construction for Digging- Buckets, of which the following is a full, clear, and exact description.

My invention relates to teeth 'for buckets or clippers on drag line excavators, steam shovels, dredges, or wherever strong sharp teeth are necessary.

The objects of my improvements are:

1st. To provide sharp teeth thereby enabling them to more quickly enter the ground without sliding over it; to more easily penetrate the ground after entering; and to enable a drag bucket to enter the ground at a less angle with the line of pull, thereby economizing power and facilitating the digging operation.

2nd. To provide teeth of such simple form that they can be made of very hard steel with very little shaping or working; to provide teeth'so small that they can be made of a fine quality of.steel without eX- cessive cost; and to protect them and thereby enable them to withstand severe usage.

3rd. To provide a bucket bottom with sockets of strong and simple form, requiring little accurate fitting and v expensive workmanship.

4th. To provide teeth such that dull ones can be removed and sharp ones inserted in the field, easily, quickly, and with fewtools or appliances.

5th. To provide teeth that will not wear round or blunt under severe usage.

6th. To so space the teeth on the jaw or lip of the bucket that they will cut wider than the body of the bucket and leave a clearance between the sides of the bucket and the hard, unbroken ground.

7th. To set the teeth at such'an angle I with the bottom of the bucket, that the bucket resting on its bottom will tend to force the teeth ,into the ground.

I attain these objects by the design illustrated in the accompanying drawing in which Figure 1 is a side elevation of the teeth as applied to an ordinary drag line bucket; Fig. 2 is a front elevation of the teeth and bucket with the bail removed; Fig. 3 is an enlarged section on the center line of Fig. 2, with elevations of the tooth and filler Specification of Letters Patent.

Patented Mar. 16, 1920.

Serial No. 18,203.-

bolt. Fig.4 is a view in side elevation of one of the teeth employed. Fig. 5 is an end elevation of the tooth shown in Fig. 4, and Fig. 6 is a side elevation of an ejector employed for removing the teeth. A given piece carries the same number throughout .the several views. i

' steel, but also from its shape, the comparatively thin flanges wearing away faster than the massive center.

tool steel is much harder than the cast steel jaw. The relatively soft steel jaw wears away faster than the hard steel tooth. The combined tooth and holder thus tend to retain a tapering or pointed form due to the difference in the hardness of the two metals. Dull teeth can be driven out and sharp ones inserted in the field with simply a hammer and punch. The filler bolt 4 is simply to facilitate driving out the tooth, as other This also facilitates grinding. The tooth of high grade wise the hole would be filled with mud and gravel. The outer teeth are the outermost points of the jaw and incline slightly outward and are wide enough to leave a clearance between the body of the bucket and the hard unbroken ground. The teeth also incline slightly downward, when the bottom of the bucket is level, to set them easily and quickly into the ground Sharp teeth will enter the ground more nearly in the line of the pull than will large dull ones, filling the bucket better and greatly economizing power.

Having thus described my invention, I claim as new and desire to secure by Letters Patent I claim,

1. A digging 0r scoop bucket provided along its lower front working edge with a plurality of tooth receiving sockets the axes of which are forwardly and downwardly inclined, said bucket further provided with openings less in diameter than said sockets and extending rearwardly therefrom, an ejector mounted in each socket with the head of said ejector of proper size to be slidable in said recess and the stem thereof extended in the opening connecting therewith, and a tooth secured in each socket. Y Y I 2. A digging or scoop bucket provided along its front working edge with a plurality of'tooth receiving sockets, an ejector in each'socket, a tooth in each socket, and means for temporarily and snugly looking each tooth in its socket. 1 i

3. A digging or scoop bucket provided along its lower working edge with a pluraility of tooth receiving sockets, an ejector mounted in each socket, said ejector com-- prising a head adapted to seat near the bottom or rear wall of said socket and provided with an extended stem, a tooth adapted to be mounted in each socket.

4. A digging or scoop bucket provided along its lower front 'working edge with a plurality of toothreceiving sockets, an ejector comprising a head the rear Wall thereof andfurthermore provided with an extended stem, said socket provided with a tran'sverseopening apslidably mounted insaid socket and arranged to seat near proximately tangential to the recess in the socket, a tooth arranged to be seated in the recess in said socket and means for locking said tooth in said socket.

5. The combination with a digging or scoop bucket provided along-its lower front Working edge with a plurality of tooth re ceiving ,sockets, of avplurality of teeth having a' plurality of longitudinally-extending grooves in the outer faces thereof mounted in said sockets.

6; The combination with a digging or scoop bucket provided along its lower front working edge with a lurality of tooth receiving sockets, of a p urality of teeth each having two pairs of longitudinally-extending grooves in the outer face thereof with the members of each pair of grooves diametrically opposite to each other.

In testimony whereof, I have signed my name to this specification in the presence of p two subscribim witnesses, this th day of March 1915. i V

I JOHN W. KITTRE-DGE.

Witnesses: v

F. W. CAsTLE,

G. L. WITSAMAN. 

